You propose an experiment where root hairs of a particular plant species are continuously treated with an antibiotic while nutrient levels in the plant tissue are monitored. Based on your knowledge of root hairs, you hypothesize the plant will experience a deficiency in what nutrient?
A. phosphorus
B. calcium
C. carbon
D. nitrogen
E. potassium
Answer: D
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The process by which the base sequence of all or a portion of a DNA molecule is used to direct the synthesis of an RNA molecule is called ________.
A. replication B. reverse transcription C. transcription D. translation
What kind of bond exists between two amino acids
in a protein? a. peptide b. ionic c. hydrogen d. amino e. sulfhydroxyl
Why don't corneal transplants (in the eye) provoke an immune response?
a. corneas are not cellular structures b. corneal cells secrete a chemical to trigger apoptosis in attacking lymphocytes c. lymphocytes recognize all corneas as "self" d. there are no lymphocytes in the eye e. corneal cells resemble lymphocytes
The adrenal medulla produces
a. mineralocorticoids. b. epinephrine. c. cortisol. d. testosterone. e. glucocorticoids